Largest Plateaus in the World: Area, Extent and Rankings

Largest Plateau Regions by Area and Definition

Published area estimates are most useful when their geographic boundaries are stated. A conventional estimate for a named plateau may differ from a later survey that includes surrounding mountains and associated basins.

The following limited ranking compares two broad, cross-border plateau regions with published geomorphological boundary delineations. It uses a revised Tibetan Plateau boundary published in 2021 and a Mongolian Plateau boundary published in 2026. Both measurements represent regional geographic extents rather than only relatively level plateau surfaces. Their boundaries were developed independently, so the ordering applies to these two mapped extents and is not a standardized ranking of every plateau on Earth.

Other Large Plateau and Highland Regions

Several extensive plateau-like regions cannot be placed reliably in the same numerical ranking. Some are continental physiographic divisions, others are mountain-framed basin systems, and the Antarctic Plateau is an elevated ice surface. Their reported areas and physical identities are presented separately.

What Counts as One of the Largest Plateaus?

A plateau is raised land with a broad surface and generally lower regional relief than a mountain range. It may be flat, rolling, cut by canyons, broken by basins, or edged by steep escarpments. Size alone does not establish whether a landform belongs in a plateau ranking.

Large plateau lists vary because geographers do not always use the same boundary rules. One source may count only the central elevated surface. Another may include nearby uplands, mountain rims, basins, lava fields, or desert interiors. The distinction is explained further in how plateau boundaries affect calculated area.

There are four useful geographic distinctions in large-plateau comparisons:

• Named plateau: A landform widely recognized as one plateau, such as the Tibetan Plateau, although its mapped margins may still vary.
• Plateau province: A wider physiographic region containing plateaus, basins, escarpments, and uplands, such as the Colorado Plateau.
• Highland region: A broad raised area containing hills, ridges, mountain systems, and tablelands, such as the Brazilian Highlands.
• Ice plateau: A high ice-covered surface, such as the Antarctic Plateau, where the visible surface is ice rather than exposed rock.

The Tibetan Plateau remains the conventional answer to “What is the largest plateau in the world?” in general geographic references. National Geographic uses this classification and gives an area of about 2.5 million km². That description should not be interpreted as proof that every wider physiographic region or every separately delineated highland system occupies less land.

The Tibetan Plateau: The Largest Plateau in Conventional Geography

The Tibetan Plateau stretches across a vast part of High Asia. It is bordered and shaped by some of the planet’s highest mountain systems, including the Himalaya to the south, the Kunlun Mountains to the north, the Karakoram to the west, and the Hengduan ranges toward the east.

Its conventional area is often given as about 2.5 million square kilometers. A revised geographic boundary dataset published in 2021 calculated approximately 3.08 million km² after extending the mapped region beyond an earlier China-centered boundary to include adjoining terrain in other countries. These figures describe different geographic extents rather than a physical expansion of the plateau between the measurement dates.

Its average elevation is usually described as more than 4,500 meters above sea level, although regional estimates depend on the boundary and terrain included. That combination of area and height distinguishes it from most other large plateaus.

Why the Tibetan Plateau Is So Large and High

The plateau formed mainly through tectonic uplift. The Indian Plate moved northward and collided with the Eurasian Plate. That collision thickened the crust, raised the Himalaya, and lifted a wide interior region behind the mountain front.

The surface is not a single flat plain. It includes basins, lake districts, mountain chains, permafrost areas, broad grasslands, and deeply cut river valleys. The plateau is high, but it is also internally complex.

Rivers and Basins of the Tibetan Plateau

The Tibetan Plateau is often called a great Asian water tower because many major rivers begin in or near its highlands. These include the Indus, Brahmaputra (Yarlung Tsangpo in Tibet), Yangtze, Yellow River, Mekong, and Salween.

Not all water leaves the plateau. Many interior basins hold lakes, salt flats, marshy wetlands, and closed drainage systems. In those basins, water may evaporate instead of reaching the sea.

Climate and Landscape

Elevation shapes the plateau’s climate. Thin air, strong sunlight, cold nights, and long winters are common across many areas. The southern and eastern margins receive more moisture, while northern and western interiors are drier.

The landscape includes alpine steppe, cold desert, high lakes, river valleys, glaciers, and grazing lands. Even where the surface looks open and plain-like, the altitude changes the climate sharply.

Antarctic Plateau: A Huge Ice-Covered Plateau

The Antarctic Plateau, also called the Polar Plateau or East Antarctic Plateau, lies in the high interior of East Antarctica. It extends through the South Pole region and forms an extensive elevated part of the Antarctic Ice Sheet.

It is not directly comparable with exposed rock plateaus in a simple land-area ranking because the visible plateau surface is mainly ice. Its high interior also lacks a single universally adopted plateau polygon for global area comparisons.

Why It Is Different from Other Large Plateaus

Most terrestrial plateaus are mapped through exposed terrain, geological structure, lava sheets, or eroded land surfaces. The Antarctic Plateau is different because its upper surface is shaped by ice thickness, accumulation, wind, and the buried bedrock below.

Much of the high interior ice surface stands near or above 3,000 meters above sea level. The climate is extremely cold and dry. Snowfall is low in many interior areas, and winds can redistribute or reshape the surface snow.

How to Treat It in a Plateau List

The Antarctic Plateau belongs in a discussion of Earth’s large plateau surfaces. Its area should be assessed using a defined ice-surface boundary. Neither the total area of Antarctica nor the full area of the East Antarctic Ice Sheet should automatically be substituted for the plateau itself.

Iranian Plateau: A Vast Mountain-Ringed Interior

The Iranian Plateau is a wide highland and plateau region across Southwest and Central Asia. It is often linked with Iran, Afghanistan, parts of Pakistan, and nearby mountain belts and basins.

It is not a smooth tableland. It is a mountain-ringed region with deserts, interior basins, ranges, salt flats, and high plains. The Zagros Mountains form a major western boundary. The Alborz Mountains rise near the southern edge of the Caspian Sea. Farther east, the plateau connects toward Afghanistan and Balochistan.

Formation and Relief

The Iranian Plateau sits in a zone shaped by plate movement, folding, uplift, erosion, and basin formation. The collision and movement of surrounding plates helped raise mountain belts and close off interior drainage areas.

Because of that history, the region includes both high mountains and lower desert basins. It is better described as a plateau system than as a single flat surface.

Rivers, Deserts, and Basins

Much of the region is dry. Some rivers drain toward inland basins instead of reaching the ocean. Salt deserts and playas form where water gathers and evaporates.

This gives the Iranian Plateau a recognizable geographic character: a raised interior framed by mountains, with many areas shaped by aridity and closed drainage.

Mongolian Plateau: Steppe, Desert, and Inland Drainage

The Mongolian Plateau is a large raised region in East and Central Asia. It includes much of Mongolia, parts of northern China, and adjoining southern Russian territory. Its geography contains dry grasslands, the Gobi Desert, broad basins, high plains, and mountain systems.

A 2026 study by Wang Zhiyong and colleagues, published in Acta Geographica Sinica under the title Extent Delineation and Geomorphological Regionalization of the Mongolian Plateau, calculated an area of approximately 2.8302 million km².

The study delineated the wider geomorphological region across Mongolia, China, and Russia using multiple geographic datasets and terrain characteristics. It classified the region into 3 primary geomorphological regions, 18 secondary subregions, and 66 tertiary units.

Its geographic boundary reaches the western slopes of the Greater Hinggan Mountains in the east, the Qilian Mountains and southern Ordos margin in the south, the Sayan-Altai mountain systems in the west, and the southern edge of the Stanovoy Highlands in the north.

Why It Counts as a Large Plateau Region

The Mongolian Plateau covers a broad inland zone between mountain systems and lower basins. Across many central and eastern areas, elevations commonly lie around 900–1,500 meters, although higher mountains occur within the wider region.

The 2026 area figure includes varied terrain rather than one uniformly level surface. Older regional estimates have often ranged from about 2.7 to 3.2 million km², partly because studies use different geographic boundaries. The newer delineation provides a defined regional extent, but does not make all earlier estimates incorrect.

Dry steppe, desert pavement, dunes, salt lakes, and seasonal streams are common. The climate is strongly continental, with cold winters and warm to hot summers in many areas.

Rivers and Drainage

Some rivers flow north toward the Arctic drainage system through Siberia, while others disappear into inland basins or feed lakes. This mix of outward and closed drainage is one of the region’s main geographic characteristics.

The plateau shows how distance from the sea influences climate. Even without the extreme average elevation of Tibet, its inland position produces widespread aridity and large seasonal temperature differences.

Western Plateau of Australia: An Ancient Low-Relief Giant

The Western Plateau is Australia’s largest major physiographic division. It covers much of western and central Australia and includes large parts of Western Australia, the Northern Territory, and South Australia.

It is extensive, but it is not high in the same way as the Tibetan Plateau or Altiplano. Many areas sit only a few hundred meters above sea level. Its geographic character comes from its age, scale, relatively low relief, and ancient shield terrain.

Landscape and Climate

The Western Plateau contains deserts, stony plains, sandplains, salt lakes, low uplands, and old rock surfaces. Surface water is limited in many areas because rainfall is low and rivers often flow only after heavy rain.

Its relief is gentle compared with young mountain belts. Long erosion has worn down many landforms, leaving broad plains, low ranges, and weathered surfaces.

Why It Is Not Usually Ranked as One Named Plateau

The Western Plateau is one of the largest plateau-like regions on Earth, but it is usually discussed as a continental physiographic division rather than one individually bounded high plateau. The area commonly attributed to it includes deserts, basins, residual mountains, and other landforms. Its extent should therefore be compared with other continental divisions using comparable boundaries.

Brazilian Highlands: A Broad Plateau and Highland Province

The Brazilian Highlands cover a large part of eastern, southern, and central Brazil. They include tablelands, escarpments, low mountains, rolling uplands, and plateau surfaces.

Elevation varies widely, with many upland sectors reaching around 1,000 meters or higher. The region contrasts with the lower Amazon Basin to the north.

Landform Character

The Brazilian Highlands are not one flat table. They are a set of old uplands, plateau blocks, river divides, and escarpments. Their surfaces have been shaped by long erosion, ancient rocks, and later river cutting.

Important subregions include the Mato Grosso Plateau, Paraná Plateau, and uplands near the Atlantic margin. Steep escarpments in some areas separate higher land from coastal lowlands.

Rivers and Human Geography

The highlands help shape drainage toward major river systems. Parts of the region feed the Paraná, São Francisco, and other rivers. Many cities, farms, transport routes, and inland settlement patterns are linked to these uplands.

Because the region is a highland province rather than one sharply bounded plateau, it should be compared carefully with more narrowly defined plateau landforms.

Deccan Plateau: India’s Large Volcanic Tableland

The Deccan Plateau covers much of peninsular India south of the Narmada River. It is bounded in broad terms by the Western Ghats, Eastern Ghats, Satpura Range, and related upland margins.

Much of the Deccan sits between about 300 and 750 meters above sea level, with an often-cited average near 600 meters. It generally slopes eastward, which helps explain why several major rivers flow toward the Bay of Bengal.

Volcanic Origin and Old Rock

The Deccan is famous for the Deccan Traps, a huge basalt province formed by repeated lava flows near the end of the Cretaceous Period. These lava layers helped build parts of the plateau surface.

Other areas of the peninsular plateau are made of very old crystalline rocks. Together, these rocks form one of India’s major physical regions.

The geographical Deccan Plateau and the Deccan Traps volcanic province should not be treated as having identical boundaries. Published estimates of the basalt province may describe only its present exposed rock area, a wider volcanic region, or its reconstructed original extent.

Rivers and Climate

Major rivers linked with the Deccan include the Godavari, Krishna, and Kaveri. These rivers cut across the plateau and carry water from uplands toward lower coastal plains.

The climate is strongly shaped by the monsoon, elevation, and the Western Ghats. The western side can receive more rain, while interior rain-shadow areas can be drier.

Altiplano: The High Plateau of the Central Andes

The Altiplano lies in the central Andes, mainly across Bolivia and southern Peru, with margins reaching Chile and Argentina. It is one of the highest large plateau regions outside Tibet.

Much of it lies around 3,650 to 3,800 meters above sea level. It is an intermontane plateau, meaning it sits between mountain ranges rather than spreading as a low shield surface.

Lakes, Salt Flats, and Basins

The Altiplano includes Lake Titicaca in the north and salt flats such as Uyuni farther south. Closed basins are common because surrounding mountains limit outward drainage.

Cold nights, strong sunlight, thin air, grasslands, wetlands, and salt flats all show the effect of high elevation and basin geography.

How It Differs from the Tibetan Plateau

The Altiplano is very high, but its commonly defined central plateau area is much smaller than the Tibetan Plateau. It is also more clearly tied to the Andes as a chain of basins between mountain ranges.

Tibet is wider and linked to a much larger crustal uplift zone. The Altiplano is a high Andean basin system with a strong north-south geographic extent. A broader Altiplano-Puna region should be distinguished from the Altiplano proper when comparing area estimates.

Columbia Plateau: A Large Basalt Plateau

The Columbia Plateau lies in the northwestern United States, mainly across parts of Washington, Oregon, and Idaho. It is one of the clearest examples of a lava plateau.

Repeated basalt flows spread across the region and built a broad volcanic surface. Later, rivers cut into those layers, exposing stacked basalt cliffs and canyons.

The Columbia River Basalt Group covers an area of approximately 160,000 km² in a geological estimate reported by the USGS. That basalt extent is not the same measurement as the larger Columbia Plateau physiographic province, which may be described by a broader regional area.

Rivers and Erosion

The Columbia and Snake rivers drain much of the region. Their channels cut through the plateau and help reveal its volcanic structure.

The plateau’s climate is mostly semiarid. Grasslands, shrublands, river valleys, and irrigated farming areas all sit within the wider basalt province.

Colorado Plateau: Uplifted Tablelands and Deep Canyons

The Colorado Plateau is centered on the Four Corners region of the southwestern United States, where Arizona, Utah, Colorado, and New Mexico meet.

It covers approximately 130,000 square miles, or about 337,000 square kilometers, under a commonly used regional definition. Its terrain includes plateaus, mesas, buttes, sedimentary rock layers, uplifts, basins, and higher mountain areas.

Why It Looks So Different

The Colorado Plateau was uplifted as a broad crustal block. Instead of being folded into a narrow mountain belt, much of its sedimentary rock layering remained relatively undisturbed compared with neighboring mountain systems.

Rivers then cut into those layers. The Colorado River and its tributaries carved canyons, including the Grand Canyon. This makes the region a clear example of how a plateau can be high and broad while still deeply dissected.

Plateau, Mesa, and Canyon Together

The Colorado Plateau helps explain a common landform distinction. A plateau can hold many smaller features inside it. Mesas, buttes, cliffs, arches, canyons, and dry washes may all be part of the same plateau province.

Largest Plateaus by Landform Type

Large plateaus are easier to compare when grouped by type. A volcanic plateau, a tectonic plateau, an old shield plateau, and a polar ice plateau may all be broad and raised, but they formed through different geological or surface processes.

How the Largest Plateaus Shape Rivers and Basins

Large plateaus often act as water divides. Because they stand above nearby lowlands, rivers may begin on their surfaces and flow outward in several directions.

The Tibetan Plateau is a major example. Rivers that rise in or near it help drain huge parts of Asia. The Deccan Plateau also shows this pattern, with rivers crossing India from upland interiors toward coastal plains.

Some plateaus contain closed basins. The Altiplano, Iranian Plateau, and Mongolian Plateau all include areas where water gathers in lakes, salt flats, marshes, or dry basins rather than flowing toward the sea.

Common drainage patterns include:

• Rivers flowing outward from broad raised areas.
• Rivers draining into enclosed interior basins.
• Mountain-fed streams crossing plateau surfaces.
• River valleys cutting deeply into plateau margins.

A plateau may contain several drainage patterns at once. The surrounding mountain rims, escarpments, and lower plains influence where water flows and how valleys develop.

How the Largest Plateaus Affect Climate

Elevation changes climate. A large plateau can be cooler than nearby lowlands, even when it sits at a similar latitude. Mountain barriers surrounding a plateau may produce rain shadows, while broad elevated surfaces can influence regional atmospheric circulation.

The Tibetan Plateau affects wind, temperature, snow, glacier systems, and highland river flow across a large part of Asia. The Altiplano has a cold highland climate in the tropical and subtropical Andes. The Mongolian Plateau experiences a dry continental climate shaped by its inland position and surrounding terrain.

Lower plateaus have different climate relationships. The Western Plateau of Australia is not very high compared with Tibet, but its dry interior climate, old rock surfaces, and limited runoff characterize much of its landscape.

Largest Does Not Always Mean Highest

The largest plateau by area is not necessarily the highest plateau by average elevation. The Tibetan Plateau is notable because it has both a very large mapped extent and high average elevation.

The Western Plateau of Australia and Brazilian Highlands are extensive, but their surfaces are generally much lower. The Altiplano is very high, but smaller than the conventional Tibetan Plateau extent. The Antarctic Plateau is also extremely broad and high, although its ice-covered surface requires a separate geographic definition.

Area measures the horizontal extent of a mapped geographic unit. Elevation measures height relative to a vertical reference. These different quantities should not be combined into one ranking. Separate plateau elevation rankings focus on height rather than geographic area.

Common Mix-Ups About the World’s Largest Plateaus

Large plateau names can be confusing because maps, textbooks, and scientific studies use different geographic scales. A school map may show only the major landform label. A geological map may include basin margins, mountain rims, and old rock shields.

A larger reported area does not necessarily mean that one plateau has been incorrectly ranked. The figures may describe different landform definitions or mapped boundaries.

Why Large Plateaus Matter in Geography

Large plateaus influence climate zones, river systems, soil patterns, settlement routes, farming areas, mineral regions, and natural boundaries.

A plateau can raise terrain into a cooler climate. It can divide river basins, create steep transport barriers along its margins, and support broad interior plains. Its erosion patterns may also expose old rocks, lava layers, and sedimentary beds that record geological history.

These relationships vary among major plateau regions:

• Tibetan Plateau: Influences major Asian river systems and high-altitude climate.
• Antarctic Plateau: Forms part of the extremely cold, dry interior of Antarctica.
• Iranian Plateau: Contains mountain-framed deserts, basins, and elevated interior routes across Southwest and Central Asia.
• Mongolian Plateau: Supports dry steppe, desert, and mountain landscapes across inland Asia.
• Western Plateau of Australia: Contains extensive ancient shield terrain and arid landscapes.
• Brazilian Highlands: Form a broad raised region between coastal lowlands and interior river basins.
• Deccan Plateau: Influences peninsular India’s rivers, soils, and monsoon landscapes.
• Altiplano: Contains high Andean basins, lakes, salt flats, and cold upland settlements.
• Colorado and Columbia Plateaus: Show how tectonic uplift, volcanic activity, and river erosion shape broad raised terrain.